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SY21031 Datasheet 0.8a Asynchronous Step-down Regulator

Manufacturer: Silergy

Overview: SY21031 High-Efficiency, 1.2MHz, 55V Input, 0.8A Asynchronous Step-Down Regulator.

Datasheet Details

Part number SY21031
Manufacturer Silergy
File Size 1.16 MB
Description 0.8A Asynchronous Step-Down Regulator
Datasheet SY21031-Silergy.pdf

General Description

The SY21031 high-efficiency asynchronous stepdown DC/DC regulator is using an adaptive constant off-time architecture, and can deliver 0.8A current over a wide input voltage range from 4.5V to 55V.

It integrates a main switch with low RDS(ON) to minimize conduction loss.

The 1.2MHz switching frequency permits low output-voltage ripple and reduces the external inductor and capacitor sizes.

Key Features

  • 4.5V to 55V Input Voltage Range.
  • Up to 0.8A Output Current.
  • Low RDS(ON) for Internal N-Channel Power FET: 700mΩ.
  • 1.2MHz Pseudoconstant Switching Frequency.
  • Adaptive Constant Off-Time Control.
  • Internal Soft-Start Limits Inrush Current.
  • ±1% 0.6V Reference.
  • Hiccup Mode Short-Circuit Protection.
  • EN On/Off Control with Accurate Threshold.
  • Cycle-by-Cycle Peak Current Limit.
  • RoHS-Compliant and Halogen-Free.
  • Compact SOT23-6 Package.

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SY21031 Distributor